INFA’NGTHEF, or hingfangtheft, or infangtheof

INFA’NGTHEF, or hingfangtheft, or infangtheof, is compounded
of three Saxon words: the preposition, in, fang, or fong, to
take or catch, and thef. It signifies a privilege or liberty
granted unto lords of certain manors to judge any thief taken
within their fee. Cowel.